DTC P2797-895: Auxiliary Transmission Fluid Pump Control Performance: Procedure

1. Turn the power switch off.
   Fig 1: Identifying A78 Connector Terminals

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2. Disconnect connector A78 from the oil pump motor controller.
3. Turn the power switch on (IG).
4. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A78-5 (+B) - Body ground	Power switch on (IG)	11 to 14 V

NG → See step   3 

OK: Go to next step 

1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → See step   10 

1. Check if there is an open circuit in the fusible link (OIL PMP) in the engine room No. 1 junction block.
   Fig 2: Identifying Fusible Link (Oil Pump)

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   OK

   There is no open circuit in the fusible link (OIL PMP).

NG → REPLACE FUSIBLE LINK BLOCK ASSEMBLY 

OK: Go to next step 

1. Turn the power switch off.
2. Remove the OIL PMP relay from the engine room No. 5 relay block.
   Fig 3: Identifying OIL PMP Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.
   Fig 4: Identifying OIL PMP Relay And A78 Terminal Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   Engine room No. 5 relay block OIL PMP relay terminal 3 - A78-5 (+B)	Power switch off	Below 1 Ω
   Engine room No. 5 relay block OIL PMP relay terminal 2 - Body ground	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   Engine room No. 5 relay block OIL PMP relay terminal 3 - Body ground	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 5: Inspecting Oil Pump Relay

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   Standard resistance

   Tester Connection	Condition	Specified Condition
   1 - 2	Always	151 to 203 Ω
   3 - 5	Auxiliary battery voltage is not applied between terminals 1 and 2.	10 kΩ or higher
   	Auxiliary battery voltage is applied between terminals 1 and 2.	Below 1 Ω

NG → See step   11 

OK: Go to next step 

1. Turn the power switch off.
2. Measure the voltage according to the value(s) in the table below.
   Fig 6: Identifying OIL PMP Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   Engine room No. 5 relay block OIL PMP relay terminal 5 - Body ground	Power switch off	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Turn the power switch on (IG).
2. Measure the voltage according to the value(s) in the table below.
   Fig 7: Identifying OIL PMP Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   Engine room No. 5 relay block OIL PMP relay terminal 1 - Body ground	Power switch on (IG)	11 to 14 V

NG → See step   9 

OK: Go to next step 

1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → See step   10 

1. Turn the power switch off.
   Fig 8: Identifying A74 Terminal Connector And OIL PMP Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect connector A74 from the hybrid vehicle control ECU.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   A74-24 (OPM2) - Engine room No. 5 relay block OIL PMP relay terminal 1	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   A74-24 (OPM2) or Engine room No. 5 relay block OIL PMP relay terminal 1 - Body ground	Power switch off	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   12